參數(shù)資料
型號： 90E36ERGI
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 模擬信號調理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP48
封裝： TQFP-48
文件頁數(shù)： 65/75頁
文件大?。?/td> 904K
代理商： 90E36ERGI
90E36
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Electrical Specification
68
August 24, 2011
7.2.2
MEASUREMENT ACCURACY
The measurements are all calculated with fiducial error except for
frequency and THD.
Fiducial error is calculated as follows:
Where Umea means the measured data of one measurement
parameter, and Ureal means the real/actual data of the parameter,
UFV means the fiducial value of this measurement parameter, which
can be defined as Table 16.
For the above mentioned parameters, the measurement accuracy
requirement is 0.5% maximum.
For frequency, temperature, THD+N, THD and Harmonic analysis:
Parameter Accuracy
Frequency: 0.01Hz
Temperature: 1 °C
THD/Harmonics: 5% relative error
Accuracy of all orders of harmonics: 5% relative error
Harmonic component% =
Where
means the measuring value of the h
th harmonic voltage/
current;
means the given or actual value of the h
th harmonic voltage/
current.
100%
*
U
-
U
rror
Fiducial_E
FV
real
mea
=
Table-16 Measurement Parameter Range and Format
Measurement
Fiducial Value (FV)
90E36 Defined
Format
Range
Comment
Voltage
reference voltage Un
XXX.XX
0 ~ 655.35V
Unsigned integer with unit of 0.01V
Current
maximum current Imax
(4×In is recommended)
XX.XXX
0 ~ 65.535A
Unsigned integer with unit of 0.001A
Voltage rms
Un
XXX.XX
0 ~ 655.35V
Unsigned integer with unit of 0.01V
Current rms
note 1
Ib/In
XX.XXX
0 ~ 65.535A
Unsigned integer with unit of 0.001A
Active/ Reactive Power
note 1
Un×4Ib
XX.XXX
-32.768 ~ +32.767 kW/kvar
Signed integer with unit/LSB of 1 Watt/var
Apparent Power
Un×4Ib
XX.XXX
0 ~ +32.767 kVA
Unsigned integer with unit/LSB of 1 VA
Frequency
Reference Frequency 50
Hz
XX.XX
45.00~65.00 Hz
Signed integer with unit/LSB of 0.01Hz
Power Factor
1.000
X.XXX
-1.000 ~ +1.000
Signed integer, LSB/Unit = 0.001
Phase Angle
note 2
180
XXX.X
-180 ~ +180
Signed integer, unit/LSB = 0.1
THD+N
Relative error is
adopted, no Fiducial
Value
XX.XX
0.00%-99.99%
Unit is 0.01%
THD
0.00%-399%
Arithmetic ratio, 2 bit integer and 14 bit
fractional.
Harmonic Component
0.00%-399%
Note 1:
All registers are of 16-bit. For cases when the current or active/reactive/apparent power goes beyond the above range, it is suggested to be handled by MCU in
application. For example, register value can be calibrated to 1/2 of the actual value during calibration, then multiply 2 in application.
Note 2:
Phase angle is obtained when voltage/current crosses zero at the sampling frequency of 256kHz.
100
i
u
i
u
i
u
hN
h
×
)
(
)
(
)
(
h
i
u )
(
hN
i
u )
(
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